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We have entered an era where inexpensive and readily available tools and equipment can be used to replicate, manipulate and distribute digital multimedia materials with ease. Often, the replication of digital content can produce perfect copies of the original, manipulation and editing of digital copies can deceive even the most professional eyes, and mass distribution can take place in a matter of seconds, in electronic forms. Misappropriation of digital assets
Digital imaging, image protection, digital watermarks, multimedia

M. Holliman, M. M. Yeung and B. Yeo, "Digital Watermarks: Shedding Light on the Invisible," in IEEE Micro, vol. 18, no. , pp. 32-41, 1998.
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